From Roxy Jacenko to Oprah Winfrey: 12 celebrities share how much sleep they get each night.

There’s simply no better feeling than hitting the pillow after a long day of work. But the promise of a restful nights’ sleep quickly shatters when it comes time to set the alarm.

You start to realise exactly how little sleep you’ll get, so you begin to bargain with yourself. How much time do I really need to get ready in the morning? Surely I can leave a little later for work and still get to the office at a reasonable time?

Choosing between more sleep and becoming stuck in a morning rush is something many of us struggle with.

And we’re constantly being told we need at least eight hours of sleep to maintain a healthy lifestyle, but unfortunately, that’s a luxury not many of us have time for.

To find out how much sleep we really need to function, we decided to take a look at how much shut-eye successful people get each night.

After all, they’re the ones who have to run a business or a country – surely they have this whole sleep thing figured out.

Roxy Jacenko

Image: Getty.

The successful businesswoman, influencer and mum-of-two survives on just four hours of sleep.

“I don’t really sleep that much. I get four hours… I’m probably a miserable b*tch but that’s just how it is,” Jacenko told Kyle and Jackie O.

Oprah Winfrey

The American talk-show host, actress and billionaire says she usually gets to bed by 10pm for a full eight hours of sleep.

“The last thing I do before I go to sleep is write five things that gave me great pleasure or that I was grateful for,” Winfrey told the Hollywood Reporter.

Barack Obama

Image: Getty.

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The former U.S. President is known to stay up past midnight and run on as little as four or five hours of sleep.

Obama shared on Live With Kelly and Michael in 2014 that he stays up “until like two o’clock at night, reading briefings and doing work” before waking up “at a pretty reasonable hour, usually around 7.”

Ellen DeGeneres

Image: Getty.

The comedian and television host makes sure to get around eight hours of sleep a night.

“I’m usually asleep by 11 p.m. and up around 7:30 a.m. It’s a lot!" she told People.

Which sleep routine surprised you the most? Let us know in the comments below.